6845991 has 8 divisors (see below), whose sum is σ = 9145584. Its totient is φ = 4555200.

The previous prime is 6845983. The next prime is 6846017. The reversal of 6845991 is 1995486.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6845991 - 2³ = 6845983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6845911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96 + ... + 3701.

It is an arithmetic number, because the mean of its divisors is an integer number (1143198).

Almost surely, 2^6845991 is an apocalyptic number.

6845991 is a deficient number, since it is larger than the sum of its proper divisors (2299593).

6845991 is a wasteful number, since it uses less digits than its factorization.

6845991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4401.

The product of its digits is 77760, while the sum is 42.

The square root of 6845991 is about 2616.4844734873. The cubic root of 6845991 is about 189.8798039418.

The spelling of 6845991 in words is "six million, eight hundred forty-five thousand, nine hundred ninety-one".